Bees here really love alliums - for an early bee magnet that is a bit different and blooms for a long while, there is allium bulgaricum
They also love all the later, big alliums like gladiator, ambassador, gigantium...
Echinops ritro
And they go for salvias, too (here, s. nemerosa East Friesland and s. farinacea Sallyfun Blue)
Sorry, not all bulbs of course.
